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/*
* linux/arch/h8300/platform/h8s/edosk2674/crt0_ram.S
*
* Yoshinori Sato <ysato@users.sourceforge.jp>
*
* Platform depend startup
* Target Archtecture: EDOSK-2674
* Memory Layout : RAM
*/
#define ASSEMBLY
#include <asm/linkage.h>
#include <asm/regs267x.h>
#if !defined(CONFIG_BLKDEV_RESERVE)
#if defined(CONFIG_GDB_DEBUG)
#define RAMEND (__ramend - 0xc000)
#else
#define RAMEND __ramend
#endif
#else
#define RAMEND CONFIG_BLKDEV_RESERVE_ADDRESS
#endif
.global __start
.global __command_line
.global __platform_gpio_table
.global __target_name
.h8300s
.section .text
.file "crt0_ram.S"
/* CPU Reset entry */
__start:
mov.l #RAMEND,sp
ldc #0x80,ccr
ldc #0x00,exr
/* Peripheral Setup */
bclr #4,@INTCR:8 /* interrupt mode 2 */
bset #5,@INTCR:8
bclr #0,@IER+1:16
bset #1,@ISCRL+1:16 /* IRQ0 Positive Edge */
bclr #0,@ISCRL+1:16
#if defined(CONFIG_MTD_UCLINUX)
/* move romfs image */
jsr @__move_romfs
#endif
/* .bss clear */
mov.l #__sbss,er5
mov.l er5,er6
mov.l #__ebss,er4
sub.l er5,er4
shlr #2,er4
sub.l er0,er0
1:
mov.l er0,@er5
adds #4,er5
dec.l #1,er4
bne 1b
/* copy kernel commandline */
mov.l #COMMAND_START,er5
mov.l #_command_line,er6
mov.w #512,r4
eepmov.w
/* uClinux kernel start */
ldc #0x90,ccr /* running kernel */
mov.l #_init_thread_union,sp
add.l #0x2000,sp
jsr @_start_kernel
_exit:
jmp _exit
rts
/* I/O port assign information */
__platform_gpio_table:
mov.l #gpio_table,er0
rts
gpio_table:
;; P1DDR
;; used,ddr
.byte 0x00,0x00
;; P2DDR
.byte 0x00,0x00
;; P3DDR
.byte 0x3f,0x3a
;; dummy
.byte 0x00,0x00
;; P5DDR
.byte 0x00,0x00
;; P6DDR
.byte 0x00,0x00
;; P7DDR
.byte 0x00,0x00
;; P8DDR
.byte 0x00,0x00
;; dummy
.byte 0x00,0x00
;; PADDR
.byte 0xff,0xff
;; PBDDR
.byte 0xff,0x00
;; PCDDR
.byte 0xff,0x00
;; PDDDR
.byte 0xff,0x00
;; PEDDR
.byte 0xff,0x00
;; PFDDR
.byte 0xff,0xff
;; PGDDR
.byte 0x0f,0x0f
;; PHDDR
.byte 0x0f,0x0f
__target_name:
.asciz "EDOSK-2674"
.section .bootvec,"ax"
jmp @__start
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